<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="UTF-8" />
        <title>01_复习</title>
        <style>
            div {
                width: 520px;
                border: 1px solid black;
            }

            div img {
                vertical-align: middle;
            }
            
        </style>
    </head>
    <body>
        <div>
            <img src="./img/01.jpg" alt="">
        </div>
    </body>
</html>